Steam field kitchen



July 25, 1944. I R. M. WILES ElAL 7 ,3 4,6 5

STEAM FIELD KITCHEN Filed Oct. 15,1940 2 Sheets-Sheet 1 mvsm-orw RICHARD MORGAN WILE6 JAMES KENNETH WILES 1 Y fla ATTOiRNEJ S Jul 25, 1944.

R. M. -WILES E STEAM FIELD KITCHEN Filed Oct. 15, 1940 2 Sheets-Sheet 2 INVENTOR6= RICHARD MORGAN WILES JAMES KENNETH WIL BMpQ //Q- ATTORNEYS Patented July 25, 1944 ---.4.2,35-i ,630' I t sr A u'rmLn KITCHEN Richard Morgan Wiles and James Kenneth Wiles,

' Adelaide, South Australia,

to themselves and to John Cuthill Wiles and,

. Ivor William Wiles,iall of Adelaide, South'Australia, Australia I Applicationbct'ober- 15, 1940, Serial No. 361,230

In Australia November 13, 1939 Claims. (01.1264) 7 'I'his-inve'ntionrelates to "air improved steam field kitchen which can be used as a portable or a mobile unit and which is capable "ofdealing with large quantities of food. I

The object ofthe invention is to provide an effective apparatus which maybe efliciently used whether'as a stationary unit for as a transport unit and bymeans of which edibles may be cooked and water heated Witha relatively small quantity" of fuel. i w I p A feature of our invention is a special-boiler whereby effective steam production is carried out, the boiler being adapted for use in steam cooking; A'further feature is the placing of ovens adjacent the boiler to make use 'of any waste heat from such boiler and alsoto conserve heat in the boiler when the ovens themselves'are be ing fired. Qther features are the arrangement of hot plates, the arrangement of the fines and the arrangement, of various other units which will be better understood from the description now to be made with reference to the accompanying drawings in which- V Fig, 1 is a perspective view of a portable unit,

Fig.2 is a central sectional "side elevationof the boiler unit, 7 I

Fig. 3 is a section of the boiler unit as on line 3-+3 ofFig. 2,

V i 4 isa section "of same as on line l-4 of Fig; 5 is a section of the oven, v 'Fig; 6 is a section'o'f-one of the'steam cookers,

Fig; '7 shows a steam-water heater, and 1 Fig. 8 is aside elevation of a mobileiinit.

The's'team generator I comprisesaifurnace having beneath it a grate 2 andon 'eacIi side and over the top'of same water'tubes'which are arranged in sets 3and 4. The ends of the water tubes communicate with headers 5, 6 and I disposed across the front ofthe boiler, the lower header 5 having the lower ends of the tubes 3, which extend up the side of the furnace, in communication with it, the central header 6 having the lower ends of the sets of tubes 4 in communication with it, and the upper header 1 communicating with the upper ends of all of the water tubes.

The header 1 is connected with a drum 8, the lower part 9 of which acts as a water drum, and the upper part III of which acts as a steam drum, the drum being divided by a perforated partition ll. Communication between the lower part 9 of the drum 8 and the header 1 is by means of tubes it while a third tube l3 between the header 6 and the drum 8 ensures proper circulation between that header and" the drum. A water inlet I4 communicates with the lower header '5. and this header is in communication with the central header 6 through tubes l5. e I l I Theboiler unit just described is housed' in' a she1l'l6 provided with the necessary firedoor, which shell has a portion' l'l extending overthe top of the boiler drum 8 so'that the heat from the furnace after passing between the water tubes 3and 4 may pass completely around the boiler drum so as to cause some degree of superheating of the steam in the space ill of the drum. The boiler is supported within the shell by means of stirrups l3, and the shell where necessary may be lagged with asbestos to' 'prevent the escape of heat, such lagging being usually only required within the'partl'l of the shell'as it is desired to utilise the heat from the sides of the'shell'to assist in"the warming of ovens placed on each sideofsame."

To enablethe 'water'tubes and headers to be disconnected from the steam generator as a unit the two tubes l2 and the tube 13- are provided with-unions l9,"these' unions being of-any :ap proved type and permitting'quick removaliof the water tubes and their replacement byanother set if such is required. A spare set of water tubes can thus be provided and, if for'any reason the existing set develops a' fault, thespare set can be attached ina" very short time and the unit :is again ready for operation. I'he spent gases pas's from the shell through aiiue' 20 the'lower end of which is inthe form of a collector comprisinga chamber Hand'two chambers'22, the'-former being in communication with the-inside o'fthe shell of the boiler and the latter two serving asflues for the ovens placed contiguous to theboiler. 1

The boiler itself is provided-with the' necessary safety valve-14 and pressure gauge 25 as well as with an outlet pipe 26 having upon it a control valve 21, and is also provided with a forced draught comprising a steam pipe 28 having in it a control valve 29 which pipe is disposed to force a jet of steam through the flue and thus force the draught. A water gauge 30 is provided, while a pump 3| of any usual or approved construction is used to force the required amount of water into the boiler through the inlet pipe ll.

Located one on each side of the steam generator are a pair of ovens 33 and 34 each comprising an outer shell 35 and'an inner chamber 38, the inner chamber being disposed towards one side of the outer shell to form a space between same in which is a grate 31. The gases from the grate Australia, assignors j It will be appreciated that as the ovens ares ,lo, .steam, generator.

one on each side of the steam generatorthey normally take the excess heat from such ge'nerator and therefore maybe'operated very ef ficiently. Each oven has a hot-plate 42.

Disposed above the ovens'33 and 34 are a pair" of subsidiary ovens 43 and 44 which are themsteam generator I, with a water heater 50 in the form of a steam heated storage tank placed at the back of the unit preferably with a cold water tank adjacent same. The steam utensils 45 are placed along one side of the unit and a fuel bin 64 is situated at. the rear' of the unit; The fuel bin preferably extends partway acrossthe unit only and the space adjacent same serves to hold 'altspare wheel and a spare set of tubes for the v The steam generator is provided with a pump 3|, and the flue 20 of the boiler projects through the roof 63.

selves not provided with a-fire grate=but take; their heat from the steam generatorunit-and;

from the ovens 33 and 34 so that they operate on what would otherwise be waste heat.

@Disposed along; the back of the'steam generator and ovens-are .the'steamutensils 45 which eachcomprisesa shell 46 intowhich leads a steam pipe 41 having at its bottom perforations through whichgtthe steam issues into vth shell, each utensil being provided with the necessary lid 48- and preferably :with a wirereceptacle 49 into which the materials to becooked-can be placed. p .The-unit shown in Fig. 7; comprises a hot water tank 50 having at -its top a lid and having projectingintoita steam;pipe,52.

The several steam 'pipes41and' 52 are placed intocommunication with :the steam outlet '26 fromthe boiler by means of suitable pipes 54 and hoses 55,- such piping-havingqwitl'iinit the control valves to regulate the flow ofsteamtothe units as-required; The unit constructed as ,described-herein can 'be used bothas a mobile or a portable arrangement in that the various parts can be readily dismantled one from theyother and: arefithen suitable: for transport purposes. The .particularagrouping according to which the steam' generator l isdisposed between the ovens 33 an'd'34, and thetsteam' utensils 45 and tank 50 are adisposed"adjacent"th -"generator and the ove'ns; results ina= considerable saving in fuel in that assaid'ithe waste heat from the steam generator-serves'to-heatthe ovens and also in that the ovens when they are in use='serve tomaintain therheat oft-the steaingeneratoni A heat exchange also takes place-"between the steam utensils-ian'd the'ovens and steamgeneratorso that atall times a very'efiective use is made of the heat'generatedr at any point,"

According to theembodiment shown Fig. 8

the unit is placed upon a trailer which comprises a suitable .frame 60 supported upon wheels El and including side membersylizwanda-roof 63 of anyapproved construction.,

r In thisfunit-aan oven 33 is placed adjacent a i :The sideszof the unit are preferably enclosed "which may be achieved either by using metal walls or shutters or by using canvas or the like, or a'combi'nation' of these may be used or metal sides with a, front and back closure of detachable canvas.

I The steam utensils 45 are as said disposed along one side of the unit and the opposite side thereof is provided with a table 65 which projects out but leaves suflicient room forthe cook or attendants to walk to the fuel bin 64 at the rear of the unit and to generally move about in their duties; A-small auxiliary fuel storage space 66 can conveniently-be provided adjacent the steam generator unit. The unit is provided with an entrance 6! which is preferably provided with a door of any suitable construction such as a slidable door, and a hinged step may also be providedin association with such door.

What we claim is: 1 I p 1. An improved steam field kitchen comprising a casing having sides and end Walls, a heating means, a drum in the upper portion thereof, the lower portion forming a chamber adapted to contain .saidheating means, water tubes located between the heating means and the'drum, ovens located in abutting andheat interchanging relation to. the sides of said casing, heating means located within each oven, a flue extend-- ing from the casing, a flue extending from each oven and a common outlet flue connecting said flues. 4

,2. An improved steam fieldkitchen comprising a casing having sides and endwalls, a heating' means, a drum in theupper portion'thereof, the lower portion forming a chamber adapted to contain said heating means, water tubes located between the heating means and the drum, ovens located in abutting and heat interchanging relation to thesides of said'casing, heating means located within each oven, a flue extending from the casing, a flue extendingfrom each oven; a common outlet flue connectingsaid .fiues, and steampipes connected to said drum andadapted .to be' attached to steam utensils.-

; RICHARD MORGAN WILES}. JAMES KENNETH W res. 7 

